US20050074306A1 - Template device for the control of the movements of diamond milling cutters or the like, to be mounted on stone or marble slab border polishing machines - Google Patents

Template device for the control of the movements of diamond milling cutters or the like, to be mounted on stone or marble slab border polishing machines Download PDF

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US20050074306A1
US20050074306A1 US10/949,496 US94949604A US2005074306A1 US 20050074306 A1 US20050074306 A1 US 20050074306A1 US 94949604 A US94949604 A US 94949604A US 2005074306 A1 US2005074306 A1 US 2005074306A1
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slab
template
border
permit
template device
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US7037182B2 (en
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Nicola Montresor
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/306216—Randomly manipulated, work supported, or work following device
    • Y10T409/306384—Randomly manipulated, work supported, or work following device with work supported guide means
    • Y10T409/30644—Randomly manipulated, work supported, or work following device with work supported guide means to guide tool to move in arcuate path

Definitions

  • the present invention refers to a template device for the control of the movements of diamond milling cutters or the like, to be mounted on stone or marble slab border polishing machines.
  • the template device permits to determine the procedure for an angular displacement of the diamond milling cutter heads in respect to the size of the slab to be worked, and precisely the slab thickness, in order to obtain the same profile of the template.
  • the present template device is applied to the border of the slab to be worked and cooperates with a tracer point unit or sliding block which is integral with the delivery side of the grinder of cutter.
  • the utilization of the present device permits to obtain the necessary working precision in the slab border rough machining and polishing phases. Further, the present device makes possible to interchange the shapes of the template on the base of the different dimensions and shapes of the piece to be treated. In addition, the movements of the working heads are simplified and the wear and tear of the kinematic gears is reduced. In addition, the present device permits to obtain products with precise shapes also when the kinematic gears of the spindle mechanism are not engaged perfectly.
  • slab border polishing machines permit to polish the slab borders, for instance when it is necessary to produce kitchen planes and shelves or surfaces provided with a toroidal border.
  • the machine is therefore equipped with components that permit the raw slab to be subjected to the roughing and polishing operations so as to obtain a perfectly polished slab border.
  • the conventional slab border polishing machines are provided with a horizontal supporting plane provided with a conveyor belt.
  • the marble or stone slab to be worked is placed on the said conveyor belt so that the slab advances progressively.
  • the working and polishing tools are represented by a series of heads. Each head is provided with a grinder.
  • the heads are arranged side by side and in parallel succession on supports that permit the heads to be displaced angularly in respect of the working centre of the slab border.
  • Some of the said heads in particular the ones put upstream in respect to the direction of feed of the slab to be worked, are employed to form the slab border, for instance when it is necessary to obtain toroidal profiles.
  • the slab is beveled and then, the slab is placed on the conveyor belt to be subjected to an intervention of rounding off through the diamond milling cutters or grinders. As the slab advances, it is polished through further grinders that permit to reach a perfect finishing.
  • the diamond milling grinders are shaped grinders provided with a fixed shaft, which makes necessary to employ more expensive milling cutters of different dimensions. In addition, these milling cutters deform easily and damage rapidly.
  • the cutter spindle is mounted on arcuated guides or connecting rod devices and/or four-bar linkages.
  • the constructive structure is complex and the tear and wear is high because the kinematic gears must be able to draw the head movement according to concentric shapes to the profile to be created.
  • the aim of the present invention is to remove the above inconveniences through the utilization of a template or “copy” device which controls the work of the tool indipendently from the trajectory drawn by the mechanism which moves the spindle.
  • the template device according to the present invention is carried out at very low costs, also the costs of upkeep and operation being low and therefore, this machine permits to obtain practical and economic advantages.
  • the template device according to the present invention can be carried out with profiles of different shapes and, above all, of different dimensions so that the grinders can shape slabs of any thickness through a simple change and/or adjustment of the template or tool.
  • a template device for the control of the movements of diamond milling cutters or the like, which template device is mounted on a stone or marble slab border polishing machine;
  • the main feature of this template device consists in that it is formed by an essentially circle arc-shaped piece although this piece may show other shapes; the arc-shaped piece is called templating arc and is orthogonal to the direction of feed of the slab;
  • the lower part of the template forms a base which is provided with coupling and adjusting means which permit the coupling and adjusting with the supporting frame of the slab border polishing machine in the feed sector of the slab in order to internally include the toroidal border of the slab; and that the said template cooperates with contact elements such as a sliding block or rolls or the like which are arranged on the delivery side of the shaft of a spindle which is equipped with a diamond milling cutter.
  • the said spindle may effect angular displacements controlled by the sliding block which remains tangent to the said template and the tool always remains in the correct position to create or shape the border of the slab.
  • the tool is maintained in its thrust condition by the tool rotation shaft which acts against pneumatic and/or hydraulic means.
  • FIG. 1 is a lateral schematic view of the template according to the present invention in which the template is arranged on the edge of the frame of the conveyor belt that convey the slab and acts against antagonistic means of the diamong milling head;
  • FIGS, 2 , 3 and 4 are schematic views showing the type of movements effected by the diamond milling cutter head in respect to the templating arc of the template.
  • FIG. 5 is a schematic perspective view of the template mounted on an adjustable bracket.
  • number 1 denotes a template on the whole according to the present invention.
  • the template 1 has an essentially planar circle arc shape or other shapes that correspond to the profiles to be obtained.
  • the template 1 forms a templating arc 2 in its external part and a recess 3 in its internal part.
  • the slab border to be worked of a slab 4 is inserted in the recess 3 .
  • the lower part of the template 1 is orthogonal to the direction of feed of the slab 4 and forms a base or bracket 5 which is provided with coupling means which permit the coupling with the supporting frame 6 of the slab border polishing machine in the feed sector of the slab itself.
  • the said coupling means of the bracket 5 may be screws or other similar coupling means.
  • the said template 1 cooperates with contact elements, such as a sliding block 7 or the like, which are arranged on the delivery side of the shaft of a spindle 8 which is equipped with a diamond milling cutter 9 .
  • the sliding block 7 forms an adjusting bracket.
  • the sliding block or adjusting bracket touches the template, it permits the milling cutter 9 to touch the slab border.
  • the spindle 8 is placed through a supporting plate 11 on a fulcrum 10 .
  • the spindle shaft slides axially and remains in a pushing condition towards the border of the slab 4 through a pneumatic system which permits to maintain the milling cutter 9 in touch of the border of the slab in order to obtain the wished profile.
  • the delivery side of the diamond milling cutter 9 is constrained to the adjusting bracket 7 and as a consequence of this, when the spindle rotates, the milling cutter 9 follows the profile of the shaping arc in order to obtain the shape on the piece to be worked.
  • the radius of the template 1 namely the distance between the centre and border of the templating or shaping arc, is calculated exactly in proportion to the slab thickness. Consequently, when there is a change in the said thickness, for instance in case it is necessary to work slabs of different dimensions, it is possible to replace the template with other suitable templates, otherwise it is possible to adjust the position of the template as well as the position of the milling cutter in respect to the sliding block 7 .
  • the sliding block is arranged at a predetermined distance from the working surface of the milling cutter, namely at a distance referred to the shape of the template 1 .
  • the diamond milling group swing angularly in respect to the fulcrum 10 through motorized displacement means.
  • the adjusting bracket 7 or tracer point remains constantly in touch of the templating arc 2 of the template and the milling cutter 9 remains constantly in the wished position so that it is possible to obtain the wished slab profile.
  • the template may be carried out with a supporting bracket 5 which is carried out as a separate piece and is provided with adjusting means such as slots 12 .
  • the slots 12 permit the template body to be fixed and on the other hand, the slots 12 permit the bracket to be fixed to the machine with fixing and adjusting means in which screws are utilized. In this way, it is possible to horizontally and vertically adjust the template on its support 5 so that different workings are made on the slab.
  • FIG. 5 also shows a roll 13 which makes the sliding of the slab easier during the slab feeding on the conveyor belt.
  • an only template may interlocked more diamond heads, each of them being provided with a tracer point or sliding block 7 .
  • the border of the templating arc must be carried out with a higher thickness in order to receive pairs of independent sliding blocks.
  • a further advantage is represented by the fact that by utilizing the so-described system, also when the movement of the spindle has mechanical plays that are not relevant, the arcuated pattern created by the tool is always precise for the employment of the template 1 .
  • the template determines the depth of the profile cutting constantly and without errors.
  • the wear and tear of the milling cutter is reduced by adjusting the distance of the milling cutter from the sliding block 7 .
  • the so-described template device permits to obtain the necessary work precision in the slab border rough machining and polishing phases.
  • the movements of the working heads are simplified and the wear and tear of the kinematic gears is reduced.
  • the present device permits to obtain products with precise shapes also when the kinematic gears of the spindle mechanism are not engaged perfectly.
  • the so-described template permits to control the work of the tool regardless of the trajectory of the mechanism that moves the spindle.
  • a technician of the field in question may also provide changes and modifications to the so-described and represented template for the control of the diamond milling cutters and obtain solutions that are to be considered as included in the scope of protection of the invention as further defined in its peculiar features in the following claims.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)
  • Machine Tool Sensing Apparatuses (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

The template device according to the present invention permits to determine the procedure for an angular displacement of the diamond milling cutter heads in respect to the size of the slab to be worked, and precisely the slab thickness, in order to obtain the same profile of the template.
The lower part of the template (1) is orthogonal to the direction of feed of the slab (4) and forms a base (5) which is provided with coupling means which permit the coupling with the supporting frame (6) of the slab border polishing machine in the feed sector of the slab itself. The said coupling means which permit the coupling with the supporting frame or bracket (6) may be screws or other similar coupling means. The said template (1) cooperates with contact elements such as a sliding block (7) or the like which are arranged on the delivery side of the shaft of a spindle (8) which is equipped with a diamond milling cutter (9).

Description

  • The present invention refers to a template device for the control of the movements of diamond milling cutters or the like, to be mounted on stone or marble slab border polishing machines.
  • In particular, the template device according to the present invention permits to determine the procedure for an angular displacement of the diamond milling cutter heads in respect to the size of the slab to be worked, and precisely the slab thickness, in order to obtain the same profile of the template.
  • The present template device is applied to the border of the slab to be worked and cooperates with a tracer point unit or sliding block which is integral with the delivery side of the grinder of cutter.
  • The utilization of the present device permits to obtain the necessary working precision in the slab border rough machining and polishing phases. Further, the present device makes possible to interchange the shapes of the template on the base of the different dimensions and shapes of the piece to be treated. In addition, the movements of the working heads are simplified and the wear and tear of the kinematic gears is reduced. In addition, the present device permits to obtain products with precise shapes also when the kinematic gears of the spindle mechanism are not engaged perfectly.
  • As is known, different operative machines are utilized in the sector of the working of stone or marble materials. These machines include the ones that form and polish the borders of slabs made of granite, marble, stone and glazed materials.
  • The so-called slab border polishing machines permit to polish the slab borders, for instance when it is necessary to produce kitchen planes and shelves or surfaces provided with a toroidal border. The machine is therefore equipped with components that permit the raw slab to be subjected to the roughing and polishing operations so as to obtain a perfectly polished slab border.
  • The conventional slab border polishing machines are provided with a horizontal supporting plane provided with a conveyor belt. The marble or stone slab to be worked is placed on the said conveyor belt so that the slab advances progressively.
  • In the proximity of the rear of the machine and more precisely, beyond the conveyor belt there is a working unit provided with working and polishing tools. As the slab advances with a linear movement at a constant speed, the said tools work and polish the slab.
  • The working and polishing tools are represented by a series of heads. Each head is provided with a grinder. The heads are arranged side by side and in parallel succession on supports that permit the heads to be displaced angularly in respect of the working centre of the slab border.
  • Some of the said heads, in particular the ones put upstream in respect to the direction of feed of the slab to be worked, are employed to form the slab border, for instance when it is necessary to obtain toroidal profiles.
  • In such cases, at first the slab is beveled and then, the slab is placed on the conveyor belt to be subjected to an intervention of rounding off through the diamond milling cutters or grinders. As the slab advances, it is polished through further grinders that permit to reach a perfect finishing.
  • In some cases, the diamond milling grinders are shaped grinders provided with a fixed shaft, which makes necessary to employ more expensive milling cutters of different dimensions. In addition, these milling cutters deform easily and damage rapidly.
  • In other known solutions, the cutter spindle is mounted on arcuated guides or connecting rod devices and/or four-bar linkages. In these cases, there is the problem that the constructive structure is complex and the tear and wear is high because the kinematic gears must be able to draw the head movement according to concentric shapes to the profile to be created.
  • The known type of actuation of the diamond grinders in the slab border polishing machines was very complex and expensive and involved many difficulties as regards the construction and operation of the machine, the costs of such machines and the costs of their operation being too high.
  • The aim of the present invention is to remove the above inconveniences through the utilization of a template or “copy” device which controls the work of the tool indipendently from the trajectory drawn by the mechanism which moves the spindle.
  • The template device according to the present invention is carried out at very low costs, also the costs of upkeep and operation being low and therefore, this machine permits to obtain practical and economic advantages.
  • In addition, the template device according to the present invention can be carried out with profiles of different shapes and, above all, of different dimensions so that the grinders can shape slabs of any thickness through a simple change and/or adjustment of the template or tool.
  • All the above indicated aims and advantages are reached according to the present invention through a template device for the control of the movements of diamond milling cutters or the like, which template device is mounted on a stone or marble slab border polishing machine; the main feature of this template device consists in that it is formed by an essentially circle arc-shaped piece although this piece may show other shapes; the arc-shaped piece is called templating arc and is orthogonal to the direction of feed of the slab; the lower part of the template forms a base which is provided with coupling and adjusting means which permit the coupling and adjusting with the supporting frame of the slab border polishing machine in the feed sector of the slab in order to internally include the toroidal border of the slab; and that the said template cooperates with contact elements such as a sliding block or rolls or the like which are arranged on the delivery side of the shaft of a spindle which is equipped with a diamond milling cutter.
  • The said spindle may effect angular displacements controlled by the sliding block which remains tangent to the said template and the tool always remains in the correct position to create or shape the border of the slab. The tool is maintained in its thrust condition by the tool rotation shaft which acts against pneumatic and/or hydraulic means.
  • Further features and detains of the present invention will be better understood from the following specification that is provided as a non-exclusive example on the hand of the accompanying drawings wherein:
  • FIG. 1 is a lateral schematic view of the template according to the present invention in which the template is arranged on the edge of the frame of the conveyor belt that convey the slab and acts against antagonistic means of the diamong milling head;
  • FIGS, 2, 3 and 4 are schematic views showing the type of movements effected by the diamond milling cutter head in respect to the templating arc of the template; and
  • FIG. 5 is a schematic perspective view of the template mounted on an adjustable bracket.
  • With reference to the accompanying drawing, and in particular FIG. 1, number 1 denotes a template on the whole according to the present invention. The template 1 has an essentially planar circle arc shape or other shapes that correspond to the profiles to be obtained. In practice, the template 1 forms a templating arc 2 in its external part and a recess 3 in its internal part. The slab border to be worked of a slab 4 is inserted in the recess 3.
  • The lower part of the template 1 is orthogonal to the direction of feed of the slab 4 and forms a base or bracket 5 which is provided with coupling means which permit the coupling with the supporting frame 6 of the slab border polishing machine in the feed sector of the slab itself. The said coupling means of the bracket 5 may be screws or other similar coupling means.
  • The said template 1 cooperates with contact elements, such as a sliding block 7 or the like, which are arranged on the delivery side of the shaft of a spindle 8 which is equipped with a diamond milling cutter 9.
  • The sliding block 7 forms an adjusting bracket. When the sliding block or adjusting bracket touches the template, it permits the milling cutter 9 to touch the slab border. This is due to the fact that the spindle 8 is placed through a supporting plate 11 on a fulcrum 10. In addition, the spindle shaft slides axially and remains in a pushing condition towards the border of the slab 4 through a pneumatic system which permits to maintain the milling cutter 9 in touch of the border of the slab in order to obtain the wished profile.
  • In addition, the delivery side of the diamond milling cutter 9 is constrained to the adjusting bracket 7 and as a consequence of this, when the spindle rotates, the milling cutter 9 follows the profile of the shaping arc in order to obtain the shape on the piece to be worked.
  • The radius of the template 1, namely the distance between the centre and border of the templating or shaping arc, is calculated exactly in proportion to the slab thickness. Consequently, when there is a change in the said thickness, for instance in case it is necessary to work slabs of different dimensions, it is possible to replace the template with other suitable templates, otherwise it is possible to adjust the position of the template as well as the position of the milling cutter in respect to the sliding block 7. In this regard, it is to be noted that the sliding block is arranged at a predetermined distance from the working surface of the milling cutter, namely at a distance referred to the shape of the template 1.
  • For the working of the border of the slab 4 it is thus sufficient to apply a template 1 to the machine, which template must correspond to the slab to be worked. Then, the work cycle is started. As the slab is fed on the conveyor belt, the diamond milling group swing angularly in respect to the fulcrum 10 through motorized displacement means.
  • The adjusting bracket 7 or tracer point remains constantly in touch of the templating arc 2 of the template and the milling cutter 9 remains constantly in the wished position so that it is possible to obtain the wished slab profile.
  • As represented in FIG. 5, the template may be carried out with a supporting bracket 5 which is carried out as a separate piece and is provided with adjusting means such as slots 12. On the one hand, the slots 12 permit the template body to be fixed and on the other hand, the slots 12 permit the bracket to be fixed to the machine with fixing and adjusting means in which screws are utilized. In this way, it is possible to horizontally and vertically adjust the template on its support 5 so that different workings are made on the slab.
  • FIG. 5 also shows a roll 13 which makes the sliding of the slab easier during the slab feeding on the conveyor belt.
  • Advantageously, it is provided that an only template may interlocked more diamond heads, each of them being provided with a tracer point or sliding block 7. In this case, the border of the templating arc must be carried out with a higher thickness in order to receive pairs of independent sliding blocks.
  • A further advantage is represented by the fact that by utilizing the so-described system, also when the movement of the spindle has mechanical plays that are not relevant, the arcuated pattern created by the tool is always precise for the employment of the template 1. The template determines the depth of the profile cutting constantly and without errors.
  • In addition, it is to be noted that the wear and tear of the milling cutter is reduced by adjusting the distance of the milling cutter from the sliding block 7.
  • As can be seen, and as indicated before, the so-described template device permits to obtain the necessary work precision in the slab border rough machining and polishing phases. In addition, the movements of the working heads are simplified and the wear and tear of the kinematic gears is reduced. Further, the present device permits to obtain products with precise shapes also when the kinematic gears of the spindle mechanism are not engaged perfectly. In other words, the so-described template permits to control the work of the tool regardless of the trajectory of the mechanism that moves the spindle.
  • A technician of the field in question may also provide changes and modifications to the so-described and represented template for the control of the diamond milling cutters and obtain solutions that are to be considered as included in the scope of protection of the invention as further defined in its peculiar features in the following claims.

Claims (5)

1. Template device (1) for the control of the movements of diamond millng cutters or the like, which template device is mounted on a stone or marble slab border polishing machine, charcterized in that the template device is formed by an essentially circle arc-shaped piece although this piece may show other shapes, the arc-shaped piece although this piece may show other shapes, the arc-shaped piece being called templating arc and being arranged orthogonally to the direction of feed of a slab; the lower part of the template forms a base which is provided with coupling and adjusting means which permit the coupling and adjusting with the supporting frame (6) of the slab border polishing machine in the feed sector of the slab in order to internally include the border of the slab; and that the said template cooperates with contact elements such as a sliding block (7) or rolls or the like which are arranged on the delivery side of the shaft of a spindle (8) which is equipped with a diamond milling cutter (9).
2. Template device, as claimed in claim 1, characterized in that the said spindle (8) may affect angular displacements controlled by the sliding block (7) which remains tangent to the said template (1) and the tool always remains in the correct position to create or shape the border of the slab (4); the tool is maintained in its thrust condition by the tool rotation shaft which acts against pneumatic and/or hydraulic means.
3. Template device, as claimed in claim 1, characterized in that the lower part of the template (1) is orthogonal to the direction of feed of the slab (4) and forms a base or bracket (5) which is provided with coupling means which permit the coupling with the supporting frame (6) of the slab border polishing machine in the feed sector of the slab itself.
4. Template device, as claimed in claim 1, characterized in that the template may be carried out with a supporting bracket (5) which is carried out as a separate piece and is provided with adjusting means such as slots (12); on the one hand, the slots (12) permit the template body to be fixed and on the other hand, the slots (12) permit the bracket to be fixed to the machine with fixing and adjusting means in which screws are utilized.
5. Template device, as claimed in claim 1, characterized in that there is a roll (13) which makes the sliding of the slab easier during the slab feeding on the conveyor belt.
US10/949,496 2003-10-01 2004-09-24 Template device for the control of the movements of diamond milling cutters or the like, to be mounted on marble or stone slab border polishing machines Expired - Lifetime US7037182B2 (en)

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ITVR2003U000049 2003-10-01
IT000049U ITVR20030049U1 (en) 2003-10-01 2003-10-01 DIMA DEVICE FOR CHECKING THE HANDLING OF CUTTERS DIAM ANTATE OR SIMILAR, APPLICABLE ON POLISHED SLAB MACHINES IN MATE RIALE LAPIDEO.

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EP (1) EP1520659B1 (en)
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ES (1) ES2384098T3 (en)
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CN1603080A (en) 2005-04-06
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EP1520659A1 (en) 2005-04-06
US7037182B2 (en) 2006-05-02
CN100522530C (en) 2009-08-05
ITVR20030049U1 (en) 2005-04-02
ATE548155T1 (en) 2012-03-15
EP1520659B1 (en) 2012-03-07
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PT1520659E (en) 2012-04-12
HRP20120454T1 (en) 2012-07-31

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